search for Asian font in English text

users
#1

Good morning.
I have this not very long English text with occasional Japanese characters in it.
I would like to search for ONLY the Japanese characters, naturally the font is different from the English but attribut "regular" and size are the same,
and if possible change their attributes (color, highlighting etc.).

Searching the net, I found:
https://ask.libreoffice.org/en/question/140748/how-do-i-search-for-a-specific-font-in-writer/
"The Find and Replace dialog (Control+H) should be able to search for text by font. Leave the "Find" box blank. Then go Other options > Format and fill in the "Family" box."

However, that does NOT work.
I tried to search for all sorts of things: format, attribute, language etc., but so far nothing helped finding Japanese characters.

If anybody knows how to do that, I would be grateful for a hint.
Thank you.
Thomas

#2

Set your "other options" in the find/replace box to enable regular
expressions

All Kanji characters, paste the following into search.

([一-龯]+)

All Hiragana or Katakana characters paste the following into search.

([ぁ-んァ-ン]+)

note this 2nd one has 2 unicode ranges... you can reduce this to search for
only one. But the site I copied these ranges from lists Hiragana and
Katakana together. I presume the first is Hiragana, but I've really no
clue. If you're working with text, one of these might be familiar.

In the replace section, paste
$1

and while the cursor is active in the replace box, select format.

The site I copied the regex ranges from:
https://gist.github.com/terrancesnyder/1345094

About the brackets & parenthesis in REGEX searches:
https://stackoverflow.com/questions/9801630/what-is-the-difference-between-square-brackets-and-parentheses-in-a-regex

#3

Good afternoon

Set your "other options" in the find/replace box to enable regular expressions

All Kanji characters, paste the following into search.

([一-龯]+)
In the replace section, paste
$1

That is great! It works.
Thank you!
Thomas